Paper tube and method of making



June 4, 1940. 0 L. A. YOUNG PAPER TUBE AND METHOD OF MAKING Filed July23, 1958 2 Sheets-Sheet 1 INVENT OR. BY Leo/70m. Xaz/fiy 6 mzfigA i TRNEYS L. A. YOUNG PAPER TUBE AND METHOD OF MAKING June 4, 1940.

Filed July 23. 1938 2 Sheets-Sheet 2 ATTORNEYS A UNITED srA'ras- T PATENOFFICE- mm runs am) METHOD or Mama Leonard A. Young, Detroit, Mich.

Application July 23, 19:8. Serial No. 220.2114

a Claims. (01. ss- -94) very economically and rapidly produced.

Second, to provide a paper tube which is very rigid in proportion to theamount of material or stock.

Third, to provide a paper tube which is well adapted for use as agarment hanger strut.

Fourth, to provide a method of making paper tubes and similar structureshaving the advantages above indicated.

Objects relating to details and economies of the invention will appearfrom the description to follow. The invention is defined and pointed outin the claims.

Preferred embodiments'of the invention are illustrated in theaccompanying drawings, in which,

Fig. 1 is a fragmentary view illustrating various steps in themanufacture of a preferred embodiment of my invention.

Figs. 2, 3, 4, 5, 6 and 7 are enlarged sections on lines 22, 3-3, 4-4,55, 6-4 and- '|-'I of Fig, 1 illustrating successive steps of my method,

Fig. 7 illustrating the completed tube.

Fig. 8 is a plan view of a section of the tubing of my method cut toform a garment hanger strut.

Fig. 915 a conventionalized side elevation of a machine or apparatus forpracticing the steps of my method when a single strip of paper isemployed as distinguished from the two strips shown in Fig. 1.

Figs. 10 to 14 inclusive are enlarged fragmentary sectional views onlines corresponding to line 10-10, 11-, lI-II, l3-l3, 14- respectivelyof Fig. 9 illustrating successive steps of the method. a

Fig. 15 is a side elevation of a garment hanger embodying the strut ofthis invention.

One of the main objects of my invention is to provide a paper strut forgarment hangers such, for example, as illustrated in my Patent No.2,011,265 issued August 13, 1935, or the Oldham Patent No. 2,025,887issued to me as assignee under date of December 31, 1935, which may bevery rapidly andeconomically produced and possesses great rigidity inproportion to the amount of stock contained therein.

' Paper tubes have heretofore been produced by spiral winding and byconvolute winding and while the spiral wound tubes may be rapidlyproduced they are easily broken when subjected to lateral stresses. Theconvolute wound tubes are stronger but are quite expensive andproduction is quite expensive and requires a relatively large amount oftime in production thereof; also they require a fairly good quality ofpaper, My improved struts and paper tubes may be very rapidly producedof a relatively low or poor giraige of paper and they are very strongand Referring to Figs, 1 to 7 inclusive, I illustrate a preferred formof my invention both as to product and method. I provide a plurality ofstrips of paper I and 2 which are arranged in a superimposed relation,the strip 1 being substantially wider than the strip 2. These strips ofpaper are coated on one side with an adhesive, preferably a quick dryingadhesive. The paper and the adhesive are of such a character that whenthe adhesive is applied to the strips there is a substantial penetrationof the adhesive into the paper aswell as the surface coating which isindicated by the stippling 3 in the drawings.

The adhesive is applied to the strip l before the strip 2 issuperimposed thereon so that the strips are adhesively secured togetherin their superimposed relation. The superimposed strips are first foldedlongitudinally upon themselves, as shown in Fig. 3, and it will be notedthat this brings the adhesive bearing surfaces of the strip 2 together.The wider strip is then folded down upon the previously folded doublestrip to the position shown in Fig. 4 with one edge of the strip Iprojecting to provide a joint flap 4. The multiply strip or bodydesignated by the numeral 5 is then rolled longitudinally upon itself,preferably by a series of successive operations as shown in Figs. 5, 6and 7 into the completed tube 5 with the joint flap I within the tubeand overlapping the joint 8 resulting from the abutting edges of themultiply strip being brought together. These abutting edges arepreferably adhesively secured together although for many uses of thetube that is not essential. It will of course be understood that thefolding to provide a multiply strip or body 5 takes place before theadhesive is set and this is also true of the rolling or tube-formingstrips. With the adhesive in its unset or plastic condition, the

plies readily slip upon one another as the multiply body or strip isrolled into the tube and when the cement or adhesive is set they retaintheir shape, the adhesive serving as a stiffening medium.

There are two advantages in employing a relatively poor or cheap gradeof paper, one being that substantial amounts of the adhesive areabsorbed thereby even though the manufacturing steps are being carriedon at high speed and there is a sufiicient quantity of the adhesivepresent to serve as a stiffening medium so that the final product iscapable of sustaining very substantial loads even when of comparativelylight stock. It will be understood that in the accompanying drawings Ihave not attempted to show the parts in relative proportions as it isimpractical to do that and still provide clearness.

The completed tube 6 may be cut into suitable lengths to provide a strut9, as shown in Fig. 8. and I preferably notch the ends as at In toreceive the arms of a hanger yoke such as indicated in the patentsreferred to.

In Fig. 9 I illustrate a method of forming a tube or strut from a singlestrip of paper II as distinguished from a plurality of strips, thisstrip ll being drawn from a roll l2 between a pair of rollersl3 and II,the roller It being a glue or adhesive applying roller receiving theglue or adhesive from the tank IS. A pair of folders are conventionallyshown at l6 and II, the folder I6 bringing the strip to the positionshown partially by dotted lines in Fig. 10 and the folder I! bringing itto the position shown by full lines in Fig. 10. The folders are notillustrated, as folders are known, particularly in the textilemanufacturing art.

From the folder I! the partially folded strip designated by the numeralI8 is passed between a pair of rollers it! where it is brought into thecompletely folded strip 20. The strip then passes to a pair of coactingforming rollers 2| and 22, see Fig. 12, in which the multiply strip 20is partially conformed or rolled longitudinally upon itself, this beingpreferably merely a matter of turning the edges 23. It is then passed tothe 'coacting rollers 24, when it is brought to a channel section. It"is then passed to the rollers 26 and 21 which brings it to the form ofthe completed tube 28. Between the rollers 24, 25 and 26, 21 is areducing gauge or .die 29 which brings the edges together somewhat forthe final rolling operation and also smooths the exterior surface.

A glue applying device 30 is disposed in advance of the sizing gauge 29to apply glue to the edges of the'multiply strip or at least one edgethereof so that when they are brought together to the position shown inFig. 14 they are adhesively secured together. It will be understood thatthe meeting surfaces as indicated by the lines 3| and 32, Fig. 14, arecoated with adhe- .sive.' No attempt is made in these figures tomaintain the proportion.

After passing the rollers 21, the completedtube, indicated at 33, passesthrough a shear block 34 where it is severed by the cutter 35 coactingwith the shear block into suitable lengths to form the struts 9.

Fig. 15 illustrates the manner of mounting the strut in the wire yoke 21of the 'type described.

When a plurality of strips are used, I prefer- I ably for the sake ofeconomy and also to permit substantial impregnation use a rather poroussoft grade of paper which permits the adhesive to penetratesubstantially even when the method is practiced at a high rate of speed.When multiply strips are used, the strip I may be, if desired, of abetter grade of paper than the strip 2.

While my improved tubes and method were intended primarily by me for themanufacture of the economy of the material itself and the other 7 paperstruts and hangers and the production thereof, my method may be used inthe production of tubes.

Tubes embodying my invention have a wide application and larger tubes,for example mailing tubes, storage tubes and the like, cores for windingpaper, and various other uses, may be economically produced. I have notattempted to illustrate the various adaptations as it is believed thatthis disclosure will enable those skilled in the art to which myinvention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. A strut for garment hangers comprising a plurality of strips of paperdisposed in superimof the body abutting and adhesively secured-together.

3. A paper tube comprising .a strip of paper folded longitudinally uponitself into a multiply strip, the paper being substantially impregnatedand coated on the meeting faces of the plies with adhesive constitutinga stiffening medium, the lmltiply strip being rolled longitudinally'intoa 4. A paper strut for garment hangers comprising a strip of paperfolded longitudinally-upon itself into a multiply strip and the multiplystrip conformed into a strut. of tubular section, the paper beingsubstantially impregnated and coated on the meeting faces of the piles'withadhesive, the adhesive constituting" a stiffening medium.

5. The method of producing paper tubes com-- prising the steps ofsuperimposingand adhesively securing together strips of paper',"onestrip being wider than the other, folding the superimposed stripslongitudinally into a multiplybody with the edge of the wider stripprojecting beyond one edge of the multiply body, and conforming themultiply body by rolling longitudinally upon itself to bring the edgesof the body into abutting relation with the said projecting edgeoverlapping the joint. g

6. The method of producing papertubes comprising the steps ofsuperimposingand adhesively securing together strips ofpaper insuperimposed position, folding the superimposed strips longitudinallyinto a multiply body with a ply of one strip projecting beyond one edgeof the multiply body to provide a projecting joint flap, and conformingthe multiply body by rolling longitudinally upon itself to bring theedges of the body into abutting relation with the said projecting flapoverlapping.; the joint. p

7; The method of producing tubes comprising the steps of applyingadhesive to one side of a strip of paper and substantially impregnatingthe strip with the adheslve,-folding the strip longitudinally uponitself into. a multiply strip with the adhesive bearingsurfacesinteriorly of the to the setting of the adhesive.

9. ll paper strut for garment hangers comprising a strip of paper ioldedlongitudinally upon itseli intoa multiply strip with a D Proiecting atone edge of the multiply strip to provide a. joint flap, the multiplystrip being conformed into a strut of tubular section with the edgesthereof abutting and the flap overlapping the joint. 1 v

LEONARD A. YOUNG.

